Raup , David Malcolm
(1933–) American paleontologist
Born in Boston, Massachusetts, Raup was educated at the University of Chicago and at Harvard, where he obtained his PhD in 1957. After a brief spell at the California Institute of Technology, Raup spent the period from 1957 to 1965 at Johns Hopkins, Baltimore, and from 1966 to 1978 as professor of geology at the University of Rochester, New York. In 1980 Raup returned to the University of Chicago as professor of geophysics.
Much of Raup's work has been devoted to the problem of extinction. In 1983, in collaboration with John Sepkoski, Raup proposed the controversial thesis that extinction rates were cyclical, peaking periodically every 26 million years. The evidence for the hypothesis was derived from a large body of data collected by Sepkoski.
Initially Raup offered no explanation for such periodicity, other than to suggest that an extraterrestrial cause was more likely than a terrestrial one. Physicists were quick to take up the challenge with Richard Muller proposing the existence of a companion star of the sun, later named Nemesis, with a 26-million-year orbit, bringing with it periodic asteroid showers. Raup described the controversy which developed in his The Nemesis Affair (New York, 1986).
But, writing later in his Extinction (Oxford, 1993), he has noted that most astronomers have rejected the Nemesis and similar hypotheses. As to the 26-million-year periodicity, expert opinion is apparently evenly divided.
Raup has also published, with S. M. Stanley, a widely used textbook, Principles of Paleontology (San Francisco, 1978).

Scientists. . 2011.

Look at other dictionaries:

  • David M. Raup — David Malcolm Raup (* 24. April 1933 in Boston, Massachusetts[1]) ist ein US amerikanischer Paläontologe. Raup studierte an der University of Chicago (Bachelor 1953) und an der Harvard University mit dem Master Abschluss 1955 sowie der Promotion… …   Deutsch Wikipedia

  • Botánicos por la abreviatura del autor — Anexo:Botánicos por la abreviatura del autor Saltar a navegación, búsqueda Autor botánico es quien por primera vez describe una planta. Su nombre científico viene dado por su nomenclatura binomial seguida de la abreviatura del autor/es botánico/s …   Wikipedia Español

  • Anexo:Botánicos por la abreviatura del autor — Autor botánico es quien por primera vez describe una planta. Su nombre científico viene dado por su nomenclatura binomial seguida de la abreviatura del autor/es botánico/s. Así Aconitum anthora L. indica que fue nombrada por Carlos Linneo, el… …   Wikipedia Español

  • Liste des philosophes américains — Cette liste des philosophes américains est non exhaustive, et regroupe toutes les personnes ayant pratiqué la philosophie durant plusieurs années de leurs vies aux USA. Sommaire A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Voir aussi …   Wikipédia en Français

  • Meanings of minor planet names: 9001–9500 — As minor planet discoveries are confirmed, they are given a permanent number by the IAU s Minor Planet Center, and the discoverers can then submit names for them, following the IAU s naming conventions. The list below concerns those minor planets …   Wikipedia

  • Conservation biology — Biological conservation redirects here. For the journal, see Biological Conservation (journal). For the scientific journal, see Conservation Biology (journal). Efforts are being taken to preserve the natural characteristics of Hopetoun Falls,… …   Wikipedia

  • Paleontological Society Medal — Die Paleontological Society Medal ist der wichtigste Preis der US amerikanischen Gesellschaft für Paläontologie, der Paleontological Society. Preisträger 1963 Raymond Cecil Moore 1964 G. Arthur Cooper 1966 Alfred Romer 1967 Carl O. Dunbar 1970… …   Deutsch Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”